Engine distributors MSG 425 - Engine Performance Under Load

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SYMPTOM
POSSIBLE CAUSE
Engine Does Not Crank
• Dead Battery
• Ground Loss
• Ancillary Components Binding or Seized
• OEM Shutdown - Oil Level Safety
• Starter Lockout Relay Failure
• Ignition Switch Failure
• Bad Starter Crank Control Wire Failure
• Loose Connection or Corrosion
Engine Performance - While Under Load
SYMPTOM
POSSIBLE CAUSE
Engine Stalls/Quits
• Faulty OEM Drivers Safety Shut-off Seat Switch
• Low Battery Voltage
• Low Fuel Pressure
• OEM Safety Shutdowns
• Bad MAP Sensor
• Air Restriction
• Coil Failure
• Fuel Mixer Binding (Dry Fuel)
Runs Rough
• Ground Loss
• Misrouted Spark Plug Wires
• Fuel System Failure
• Vacuum Leak
• Wiring Failure
• Low Fuel Pressure
• Spark Plugs Fouled
• Incorrect Valve Timing
Misses
• Fuel System Failure
• Misrouted Spark Plug Wires
• Spark Plug Gap Too High
• Spark Plugs Fouled
• Cracked Spark Plug Insulator
• Incorrect Valve Timing
• Compression Loss
Hesitation/Stumble
• Low Fuel Pressure
• Spark Plugs Fouled
• MAP Sensor Vacuum Signal Loss
Surge
• Low Fuel Pressure
• Map Sensor Failure
• Application or Ancillary System Momentarily Binding
During Load or Unload
Backfires
• Faulty OEM Drivers Safety Shut-off Seat Switch
• Fouled Spark Plugs
• Spark Plug Wire Broke
• GCP Momentary Ground Loss
• Excess Lean Condition
• Fuel Lock-Off Leaking (Dry Fuel)
• Intake Manifold Leak
• Bad Intake Valve